KR20140116083A - Exhaust gas reduction device for heavy equipment - Google Patents

Exhaust gas reduction device for heavy equipment Download PDF

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KR20140116083A
KR20140116083A KR1020147018497A KR20147018497A KR20140116083A KR 20140116083 A KR20140116083 A KR 20140116083A KR 1020147018497 A KR1020147018497 A KR 1020147018497A KR 20147018497 A KR20147018497 A KR 20147018497A KR 20140116083 A KR20140116083 A KR 20140116083A
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South Korea
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dpf
scr
particulate filter
exhaust gas
selective catalytic
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KR1020147018497A
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Korean (ko)
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박철현
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볼보 컨스트럭션 이큅먼트 에이비
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Priority to PCT/KR2012/000151 priority Critical patent/WO2013103169A1/en
Publication of KR20140116083A publication Critical patent/KR20140116083A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/92Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08Superstructures; Supports for superstructures
    • E02F9/0858Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1822Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28Construction of catalytic reactors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

본 발명은 디젤여과필터(DPF)에 선택적 촉매환원(SCR) 장치를 더 구비하여 강화된 디젤 엔진 배기가스 규제요건을 충족시키고, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 카울프레임 상에 장착하여 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있는 중장비용 배기가스 저감장치에 관한 것이다.
본 발명의 구성은, 엔진과 인접하는 메인프레임 일측에 장착되어 엔진의 진동에 따른 영향을 저감시키는 카울프레임; 일단부가 배기파이프의 타단부와 연통되어 카울프레임 상단부에 장착되고, 디젤산화촉매(DOC)를 내측에 구비하며, 입자상 물질을 포집하는 디젤여과필터(DPF); 일단부가 디젤여과필터(DPF) 타단부와 연통되고, 일측이 환원제를 분사하는 분사장치와 연통되는 믹싱파이프; 및 믹싱파이프의 타단부와 연통되어 카울프레임 상단부에 장착되고, 분사된 환원제와 배기가스 내의 질소산화물(NOx) 간의 환원반응을 촉진하는 선택적 촉매환원(SCR) 장치를 포함하는 것을 특징으로 한다.
The present invention further includes a selective catalytic reduction (SCR) device in a diesel particulate filter (DPF) to meet enhanced diesel engine exhaust gas regulatory requirements and to provide a diesel particulate filter (DPF) and selective catalytic reduction (SCR) And more particularly, to an exhaust gas reducing apparatus for heavy and heavy use which is capable of minimizing the influence of vibration caused by engine driving.
The configuration of the present invention is a cowl frame mounted on one side of a main frame adjacent to an engine to reduce the influence of vibration of the engine. A diesel particulate filter (DPF), one end of which is connected to the other end of the exhaust pipe and is mounted on the upper end of the cowl frame and has a diesel oxidation catalyst (DOC) inside and collects particulate matter; A mixing pipe communicating with the other end of the diesel particulate filter (DPF) at one end and communicating with an injector for injecting a reducing agent on one side; And a selective catalytic reduction (SCR) device communicating with the other end of the mixing pipe and mounted on an upper end of the cowl frame for promoting a reduction reaction between the injected reducing agent and nitrogen oxides (NOx) in the exhaust gas.

Description

중장비용 배기가스 저감장치{EXHAUST GAS REDUCTION DEVICE FOR HEAVY EQUIPMENT}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust gas reducing apparatus,
본 발명은 중장비용 배기가스 저감장치에 관한 것으로, 보다 상세하게는 디젤여과필터(DPF)에 선택적 촉매환원(SCR) 장치를 더 구비하여 강화된 디젤 엔진 배기가스 규제요건을 충족시키고, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 카울프레임 상에 장착하여 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있는 중장비용 배기가스 저감장치에 관한 것이다.More particularly, the present invention relates to a diesel particulate filter (DPF) that further includes a selective catalytic reduction (SCR) device to meet enhanced diesel engine exhaust gas regulatory requirements, (DPF) and a selective catalytic reduction (SCR) device mounted on a cowl frame to minimize the influence of vibrations upon driving the engine.
일반적으로 디젤 엔진은 외부공기와 연료인 경유의 혼합기체를 작동 유체로 하여 열에너지를 기계적 에너지로 변환하는 장치로, 실린더 내에서 폭발 연소된 혼합기체는 배기가스가 되어 외부로 배출된다. 이때, 배기가스가 엔진 외부로 배출될 수 있도록 엔진의 배기구와 연결된 관이 배기파이프에 해당한다. 배기가스에는 이산화탄소, 일산화탄소, 탄화수소, 황산화물, 황화수소, 질소산화물, 암모니아, 오존 및 옥시던트 등의 물질이 포함되므로 이를 그대로 대기중에 방출할 경우 환경오염을 유발하게 된다. 다만, 디젤 엔진 및 배기가스 저감장치의 기술진보에 따라 최근에는 이러한 유해가스의 배출량이 현저히 감소되고 있다.Generally, a diesel engine is a device that converts heat energy into mechanical energy by using a mixed gas of outside air and fuel oil as a working fluid, and the mixed gas explosively combusted in the cylinder is exhausted to the outside. At this time, a pipe connected to the exhaust port of the engine corresponds to the exhaust pipe so that the exhaust gas can be discharged to the outside of the engine. Exhaust gases include substances such as carbon dioxide, carbon monoxide, hydrocarbons, sulfur oxides, hydrogen sulfide, nitrogen oxides, ammonia, ozone, and oxidants. However, recent technological advances in diesel engines and exhaust emission reduction systems have significantly reduced the emission of these harmful gases.
하지만, 지구 온난화, 대기중 오존 농도 등과 관련된 환경 문제의 해결을 위해 차량이 배출하는 유해가스에 대한 환경기준을 점점 강화하고 있으며, 특히 중장비의 경우 유해가스 배출기준을 더욱 강화하고 있는 실정이다.However, in order to solve the environmental problems related to global warming and atmospheric ozone concentration, the environmental standards for harmful gas emitted by vehicles are being strengthened. Especially, heavy equipment is strengthening the emission standards.
따라서, 종래의 굴삭기를 포함한 중장비의 경우, 디젤 엔진 배기가스 규제인 Tier-4 Interim과 Stage-ⅢB를 만족하기 위해 디젤산화촉매(DOC:Diesel Oxidation Catalyst)를 내부에 구비한 디젤여과필터(DPF:Diesel Particulate Filter)를 디젤 엔진 배기구에 연결하여 CO(일산화탄소), HC(탄화수소)를 산화시키고, 입자상 물질(PM:Particulate Matter)을 포집하는 방식으로 유해가스 배출기준을 충족시키고 있다.Therefore, in order to satisfy the requirements of Tier-4 Interim and Stage-IIIB, which are regulations of diesel engine exhaust gas, a diesel particulate filter (DPF) equipped with a diesel oxidation catalyst (DOC) Diesel Particulate Filter is connected to the exhaust port of diesel engine to oxidize CO and HC and collect particulate matter (PM) to meet the emission standards.
그러나 향후 강화되는 Tier-4 Final과 Stage-Ⅳ의 경우, 질소산화물(NOx)에 대한 규제가 보다 강화되기 때문에 현재의 디젤여과필터(DPF)만으로는 이를 충족시키기 어렵게 되는 문제점이 있다.However, in the case of Tier-4 Final and Stage-IV, which are to be strengthened in the future, regulation of nitrogen oxides (NOx) is further strengthened, so that it is difficult to satisfy with the present diesel filtration filter (DPF) alone.
또한, 종래의 디젤여과필터(DPF)는 일반 차량의 머플러(muffler)와 달리 무게가 무거울 뿐만 아니라 내부에 구비된 필터 등이 진동에 매우 취약함에도 불구하고 엔진에 직접 장착됨으로써, 디젤여과필터(DPF)의 용접부위 등은 엔진 구동에 따른 진동과 작업 하중에 직접적인 영향을 받아 크랙이나 파손 등의 변형이 야기되는 문제점이 있다.Unlike a muffler of a conventional vehicle, a conventional diesel filtration filter (DPF) is not only heavy in weight but also mounted directly on the engine, ) Is directly affected by vibration and work load due to engine driving, which causes deformation such as cracks or breakage.
본 발명은 상술한 바와 같은 문제점을 해결하기 위해 안출된 것으로, 디젤여과필터(DPF)에 선택적 촉매환원(SCR) 장치를 더 구비하여 강화된 디젤 엔진 배기가스 규제요건(질소산화물 저감)을 충족시킬 수 있는 중장비용 배기가스 저감장치를 제공하는 데에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a diesel particulate filter (DPF) further comprising a selective catalytic reduction (SCR) device to satisfy the enhanced diesel engine exhaust gas regulatory requirement And an exhaust gas purifying device for purifying exhaust gas.
또한, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 카울프레임 상에 장착하여 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있는 중장비용 배기가스 저감장치를 제공하는 데에 그 목적이 있다.It is another object of the present invention to provide a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) device mounted on a cowl frame to minimize the influence from vibration due to engine driving. have.
본 발명의 실시예에 따른 중장비용 배기가스 저감장치는, 엔진과 인접하는 메인프레임 일측에 장착되어 엔진의 진동에 따른 영향을 저감시키는 카울프레임; 일단부가 배기파이프의 타단부와 연통되어 카울프레임 상단부에 장착되고, 디젤산화촉매(DOC)를 내측에 구비하며, 입자상 물질을 포집하는 디젤여과필터(DPF); 일단부가 디젤여과필터(DPF) 타단부와 연통되고, 일측이 환원제를 분사하는 분사장치와 연통되는 믹싱파이프; 및 믹싱파이프의 타단부와 연통되어 카울프레임 상단부에 장착되고, 분사된 환원제와 배기가스 내의 질소산화물(NOx) 간의 환원반응을 촉진하는 선택적 촉매환원(SCR) 장치를 포함하는 것을 특징으로 한다.A heavy-duty exhaust gas reduction device according to an embodiment of the present invention includes a cowl frame mounted on one side of a main frame adjacent to an engine to reduce an influence of vibration of the engine; A diesel particulate filter (DPF), one end of which is connected to the other end of the exhaust pipe and is mounted on the upper end of the cowl frame and has a diesel oxidation catalyst (DOC) inside and collects particulate matter; A mixing pipe communicating with the other end of the diesel particulate filter (DPF) at one end and communicating with an injector, one side of which injects a reducing agent; And a selective catalytic reduction (SCR) device communicating with the other end of the mixing pipe and mounted on an upper end of the cowl frame for promoting a reduction reaction between the injected reducing agent and nitrogen oxides (NOx) in the exhaust gas.
또한, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치는, 원통형으로 이루어지되 양단부는 서로 대향하는 반구형상으로 형성되며, 각각은 카울프레임 상에서 서로 나란하게 장착되는 것을 특징으로 한다.In addition, the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) device are cylindrically shaped, and both ends are formed in a hemispherical shape facing each other, and each is mounted on the cowl frame in parallel with each other.
또한, 배기파이프 및 믹싱파이프 중 적어도 어느 한측에는 하나 이상의 플렉시블 조인트로 연결되는 연결부가 구비되는 것을 특징으로 한다.Further, at least one of the exhaust pipe and the mixing pipe is provided with a connecting portion connected by one or more flexible joints.
또한, 카울프레임과 디젤여과필터(DPF) 및 선택적 촉매환원(SCR) 장치와의 결합은, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치의 하단부를 지지하고 카울프레임 상단부에 고정되는 탄성체인 받침부재와, 받침부재 양단부에 구비되어 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치의 외주면을 감싸 고정하는 체결밴드를 포함하는 고정부를 통해 이루어지는 것을 특징으로 한다.The combination of the cowl frame with the diesel filtration filter (DPF) and the selective catalytic reduction (SCR) device can also be achieved by means of a diesel particulate filter (DPF) And a fastening band which is provided at both ends of the supporting member and includes a diesel filtration filter (DPF) and a fastening band which surrounds and fixes the outer circumferential surface of the selective catalytic reduction (SCR) device.
전술한 바와 같이 구성되는 본 발명의 실시예에 따른 중장비용 배기가스 저감장치는 다음과 같은 효과를 갖는다.The exhaust gas reducing device for heavy equipment according to the embodiment of the present invention configured as described above has the following effects.
저감장치인 디젤여과필터(DPF)에 선택적 촉매환원(SCR) 장치를 더 구비하여 질소산화물(NOx)을 효과적으로 제거함으로써, 강화된 디젤 엔진 배기가스 규제요건을 충족시킴과 아울러 환경오염을 방지할 수 있는 효과가 있다.The diesel particulate filter (DPF), which is a reduction device, is further equipped with a selective catalytic reduction (SCR) device to effectively remove nitrogen oxides (NOx), thereby satisfying the regulated diesel engine exhaust gas regulatory requirements and preventing environmental pollution There is an effect.
또한, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 엔진과 인접한 메인프레임 상에 설치된 카울프레임 상단부에 장착함으로써, 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있게 됨에 따라 저감장치의 내구성을 증대할 수 있는 효과가 있다.Further, since the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) device are mounted on the upper end of the cowl frame provided on the main frame adjacent to the engine, the influence from the vibration due to engine driving can be minimized, There is an effect that the durability can be increased.
또한, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 각각 양단부가 서로 대향하는 반구형상의 원통형으로 제작함으로써, 고온, 고압으로 유입되는 배기가스로 인한 충격을 효과적으로 완충시킬 수 있어 내구성이 증대되는 효과가 있다.In addition, the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) device are each formed into a hemispherical cylindrical shape with opposite ends facing each other, thereby effectively buffering the impact caused by the exhaust gas flowing at high temperature and high pressure, .
또한, 배기파이프와 믹싱파이프의 일측에 각각 적어도 하나 이상의 플렉시블 조인트를 형성하고, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치의 하단부에 탄성체인 받침부재를 각각 구비함으로써, 엔진 구동에 따른 진동을 보다 효과적으로 저감시킬 수 있는 효과가 있다.Further, at least one flexible joint is formed on one side of the exhaust pipe and the mixing pipe, and a supporting member, which is an elastic body, is provided at the lower end of the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) There is an effect that the vibration can be more effectively reduced.
도 1은 본 발명에 따른 중장비용 배기가스 저감장치의 장착상태를 나타낸 사시도.
도 2는 본 발명에 따른 중장비용 배기가스 저감장치의 분해사시도.
<도면의 주요부에 대한 참조 부호의 설명>
1: 중장비용 배기가스 저감장치 2: 엔진
4: 메인프레임 5: 엔진실
6: 펌프실 10: 배기파이프
11: 플렉시블 조인트 100: 카울프레임
110: 고정브래킷 200: 디젤여과필터(DPF)
300: 믹싱파이프 310: 분사장치
400: 선택적 촉매환원(SCR) 장치 410: 배출파이프
500: 고정부 510: 받침부재
520: 체결밴드
1 is a perspective view showing a mounting state of an exhaust gas reducing device for heavy equipment according to the present invention.
2 is an exploded perspective view of an exhaust gas reducing device for heavy equipment according to the present invention.
DESCRIPTION OF THE REFERENCE NUMERALS to the main parts of the drawings
1: Emission reduction device for heavy equipment 2: Engine
4: main frame 5: engine room
6: pump chamber 10: exhaust pipe
11: Flexible joint 100: Cowl frame
110: Fixing bracket 200: Diesel filtration filter (DPF)
300: Mixing pipe 310: Injection device
400: selective catalytic reduction (SCR) device 410: exhaust pipe
500: fixing part 510: supporting member
520: fastening band
이하, 본 발명의 바람직한 실시예를 첨부도면을 참조하여 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는 것이다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.
도 1은 본 발명에 따른 중장비용 배기가스 저감장치의 장착상태를 나타낸 사시도이고, 도 2는 본 발명에 따른 중장비용 배기가스 저감장치의 분해사시도이다.FIG. 1 is a perspective view showing a mounting state of a heavy equipment exhaust gas reducing apparatus according to the present invention, and FIG. 2 is an exploded perspective view of a heavy equipment exhaust gas reducing apparatus according to the present invention.
도 1 및 도 2에 도시된 바와 같이, 본 발명에 따른 중장비용 배기가스 저감장치(1)는 디젤 엔진의 배기가스에 포함된 유해가스를 저감시켜 대기 중에 배출하기 위한 장치로, 중장비의 메인프레임(4)에 장착되는 엔진(2)과 일단부가 연결되는 배기파이프(10)의 타단부에 구비될 수 있다.As shown in FIGS. 1 and 2, the apparatus for reducing exhaust gas for heavy equipment according to the present invention is an apparatus for reducing the harmful gas contained in the exhaust gas of a diesel engine and discharging it to the atmosphere. May be provided at the other end of the exhaust pipe (10) connected to the engine (2) mounted on the engine (4).
이러한 중장비용 배기가스 저감장치(1)는 대략 카울프레임(100), 디젤여과필터(DPF)(200), 믹싱파이프(300) 및 선택적 촉매환원(SCR) 장치(400) 등을 포함하여 이루어질 수 있다.Such a heavy duty exhaust gas abatement device 1 may comprise a cowl frame 100, a diesel filtration filter (DPF) 200, a mixing pipe 300 and a selective catalytic reduction (SCR) have.
여기서 카울프레임(100)은 중장비의 엔진실(5)과 펌프실(6)을 구획하고, 후술할 디젤여과필터(DPF)(200) 및 선택적 촉매환원(SCR) 장치(400) 등이 상단부에 장착될 수 있도록 공간을 제공하는 구성요소로, 엔진(2)과 인접하는 메인프레임(4) 일측에 설치된다. 이로 인해 엔진(2) 구동에 따른 진동은 카울프레임(100)에 직접적으로 전달되지 않게 된다.The cowl frame 100 divides the engine room 5 and the pump chamber 6 of the heavy equipment and a diesel particulate filter (DPF) 200 and a selective catalytic reduction (SCR) And is provided on one side of the main frame 4 adjacent to the engine 2. [ Therefore, the vibration due to the driving of the engine 2 is not directly transmitted to the cowl frame 100.
이러한 카울프레임(100)은 상기와 같은 기능을 수행할 수 있는 구조로 메인프레임(4) 상에 장착될 수 있는 것이라면, 다양하게 변형가능함은 물론이다.It is needless to say that the cowl frame 100 can be variously modified as long as it can be mounted on the main frame 4 in a structure capable of performing the above-described functions.
이때, 카울프레임(100)은 메인프레임(4)과 볼트체결 또는 용접 등에 의한 방법으로 장착될 수 있다.At this time, the cowl frame 100 may be mounted to the main frame 4 by bolting, welding or the like.
그리고 카울프레임(100) 상단부에는 고정브래킷(110)이 결합된 후, 후술할 디젤여과필터(DPF)(200) 및 선택적 촉매환원(SCR) 장치(400)가 장착될 수 있다. 이때, 카울프레임(100)의 상단부를 덮을 수 있도록 고정브래킷(110)을 설치하게 되면, 하측에 구비되는 펌프실(6)과 엔진실(5)은 서로 밀폐되므로 펌프실(6)의 오작동이나 고장으로 인해 작동유가 누출되더라도 엔진(2)과 접촉이 차단되어 화재가 방지될 수 있다.A diesel particulate filter (DPF) 200 and a selective catalytic reduction (SCR) device 400, which will be described later, may be installed after the fixing bracket 110 is coupled to the upper end of the cowl frame 100. In this case, if the fixing bracket 110 is installed to cover the upper end portion of the cowl frame 100, the pump chamber 6 and the engine room 5 provided at the lower side are hermetically sealed with each other, Even if the operating oil leaks, the contact with the engine 2 can be blocked and the fire can be prevented.
디젤여과필터(DPF)(200)는 내측에 구비되는 디젤산화촉매(DOC)를 통해 배기가스 내의 HC와 CO를 산화시키고 입자상 물질(PM)을 포집하는 방식으로 작동하여 종래의 머플러를 대체하는 구성요소에 해당한다. 디젤여과필터(DPF)(200)는 일단부가 상기 배기파이프(10)의 타단부와 연통되어 상기 카울프레임(100) 상단부에 장착되므로, 엔진(2)에서 방출되는 배기가스가 처음으로 거치게 되는 저감장치에 해당한다.The diesel particulate filter (DPF) 200 operates in such a manner that it oxidizes HC and CO in the exhaust gas through the diesel oxidation catalyst (DOC) provided therein and collects particulate matter (PM), thereby replacing the conventional muffler Element. Since the diesel particulate filter (DPF) 200 is connected to the upper end of the cowl frame 100 by being connected to the other end of the exhaust pipe 10, the exhaust gas discharged from the engine 2 can be reduced Device.
이러한 디젤여과필터(DPF)(200)는 엔진 출력 및 배기가스량에 따라 다양한 크기와 형상으로 제작될 수 있지만, 도 1 및 도 2에 도시된 바와 같이 고온, 고압으로 유입되는 배기가스로 인한 충격을 효과적으로 완충시킬 수 있도록 원통형상으로 형성하되, 양단부는 서로 대향하는 반구형상으로 형성하는 것이 바람직하다. 즉 단면이 타원형태가 되도록 하는 것이다.The diesel particulate filter (DPF) 200 can be manufactured in various sizes and shapes according to the engine output and the amount of exhaust gas. However, as shown in FIGS. 1 and 2, It is preferable to form it into a cylindrical shape so that it can be buffered effectively, and both ends are formed in a hemispherical shape facing each other. That is, the cross section is formed in an elliptical shape.
그리고 디젤여과필터(DPF)(200)는 엔진(2)에 장착되는 것이 아니고, 엔진(2)과 인접하는 메인프레임(4) 일측에 장착되는 카울프레임(100) 상단부에 설치되므로, 엔진 구동에 따른 진동 및 작업 하중으로 인한 영향을 거의 받지 않게 된다. 따라서, 진동으로 인하여 디젤여과필터(DPF)(200)의 용접부 또는 배기파이프(10)와의 연결부 등에 발생할 수 있는 크랙이나 파손과 같은 변형이 방지될 수 있다.The diesel particulate filter (DPF) 200 is not mounted on the engine 2 but mounted on the upper end of the cowl frame 100 mounted on one side of the main frame 4 adjacent to the engine 2, It is hardly affected by the vibration and the working load. Therefore, deformation such as cracks or breakage that may occur in the welded portion of the diesel particulate filter (DPF) 200 or the connection portion with the exhaust pipe 10 due to vibration can be prevented.
이러한 디젤여과필터(DPF)(200)와 카울프레임(100) 상단부는 고정부(500)에 의해 결합될 수 있다. 이러한 고정부(500)는 상기 디젤여과필터(DPF)(200)의 하단부를 지지하고 상기 카울프레임(100) 상단부(구체적으로 고정브래킷(110) 상면)에 고정되는 탄성체인 받침부재(510)와, 상기 받침부재(510) 양단부에 구비되어 상기 디젤여과필터(DPF)(200)의 외주면을 감싸 고정하는 체결밴드(520)를 포함하여 이루어질 수 있다.The diesel particulate filter (DPF) 200 and the upper end of the cowl frame 100 can be coupled by the fixing part 500. The fixing unit 500 includes a supporting member 510 that supports the lower end of the diesel particulate filter (DPF) 200 and is an elastic body fixed to the upper end of the cowl frame 100 (specifically, the upper surface of the fixing bracket 110) And a fastening band 520 provided at both ends of the receiving member 510 to enclose and fix the outer circumferential surface of the diesel particulate filter (DPF) 200.
이때, 받침부재(510)는 지지되는 상기 디젤여과필터(DPF)(200) 하단부의 외주면과 대응하는 형상으로 이루어져 디젤여과필터(DPF)(200)와 밀착되며, 엔진 구동에 따른 진동을 저감할 수 있도록 탄성을 갖는 내열성 합성수지 등으로 형성될 수 있다. 이러한 받침부재(510)는 디젤여과필터(DPF)(200)를 안정적으로 지지하기 위해 적어도 2개 이상이 구비되도록 한다.At this time, the support member 510 has a shape corresponding to the outer peripheral surface of the lower end of the diesel particulate filter (DPF) 200 supported by the support member 510 and closely contacts the diesel particulate filter (DPF) 200, Heat-resistant synthetic resin having elasticity so as to be able to be formed. At least two such support members 510 are provided to stably support the diesel particulate filter (DPF) 200.
그리고 체결밴드(520)는 상기 디젤여과필터(DPF)(200)의 외주면을 감싸 고정할 수 있도록 한 쌍으로 이루어지되, 상기 받침부재(510) 양단부와 힌지결합을 통해 회동하도록 하며, 한 쌍의 체결밴드(520) 상호 간의 결합은 나사결합 등의 다양한 결합방식이 적용될 수 있다. 이러한 체결밴드(520)를 통해 디젤여과필터(DPF)(200)는 받침부재(510) 상에 단단히 고정될 수 있다.The pair of fastening bands 520 are paired so as to surround and fasten the outer circumferential surface of the diesel particulate filter (DPF) 200. The pair of fastening bands 520 are pivotally connected to the opposite ends of the receiving member 510 through hinges, The fastening bands 520 may be coupled to each other by various coupling methods such as screw coupling. The diesel filtration filter (DPF) 200 can be firmly fixed on the supporting member 510 through the fastening band 520.
한편, 엔진 구동에 따른 진동을 보다 효과적으로 저감시키고, 열팽창에 따른 변형을 방지하기 위해 상기 배기파이프(10)의 일측에는 적어도 하나 이상의 플렉시블 조인트(11)로 연결되는 연결부가 구비되도록 할 수 있다. 이러한 플렉시블 조인트(11)는 배기파이프(10)의 길이와 엔진 진동의 정도 등을 고려하여 적정한 수가 구비되도록 함이 바람직하다. 한편, 플렉시블 조인트(11)는 금속이나 내열성의 탄성체로 제작될 수 있다.Meanwhile, in order to more effectively reduce vibration due to engine driving and prevent deformation due to thermal expansion, a connection part connected to one side of the exhaust pipe 10 by at least one flexible joint 11 may be provided. It is preferable that the flexible joint 11 has an appropriate number in consideration of the length of the exhaust pipe 10 and the degree of engine vibration. On the other hand, the flexible joint 11 can be made of metal or a heat-resistant elastic body.
디젤여과필터(DPF)(200) 내측에 구비되는 디젤산화촉매(DOC)는 백금(Pt), 팔라듐(Pd) 또는 이들을 소정비율로 포함하는 금속 등으로 이루어질 수 있으며, 디젤여과필터(DPF)(200) 내측면에 코팅처리되어 HC와 CO의 산화를 촉진하도록 할 수 있다.The diesel oxidation catalyst (DOC) provided inside the diesel particulate filter (DPF) 200 may be made of platinum (Pt), palladium (Pd) or a metal containing them in a predetermined ratio, and may be a diesel particulate filter (DPF) 200) so as to promote the oxidation of HC and CO.
또한, 디젤산화촉매(DOC)는 배기가스의 흐름과 나란하게 형성된 다수의 관통홀이 형성된 벌집 형상의 다공성 부재(촉매담체)에 코팅되어 디젤여과필터(DPF)(200) 내부에 구비되도록 함으로써, 배기가스와의 접촉면적을 크게 증대할 수 있다. 이로 인해, 촉매기능이 향상되어 HC와 CO의 산화반응은 광범위한 범위에서 일어나게 되고, 그 결과 HC와 CO는 효과적으로 저감될 수 있다.In addition, the diesel oxidation catalyst (DOC) is coated on the honeycomb porous member (catalyst carrier) having a plurality of through holes formed in parallel with the flow of the exhaust gas to be provided inside the diesel particulate filter (DPF) The contact area with the exhaust gas can be greatly increased. As a result, the catalytic function is improved and the oxidation reaction of HC and CO takes place in a wide range, and as a result, HC and CO can be effectively reduced.
그리고 디젤여과필터(DPF)(200)는 엔진(2)에서 배출되는 배기가스 중에 포함된 입자상 물질(PM)을 필터로 걸러 포집하며, 이렇게 포집된 입자상 물질(PM)은 주기적으로 연소된 후 제거된다. 이렇게 디젤여과필터(DPF)(200)를 통과한 배기가스는 믹싱파이프(300) 내로 유입된다.The diesel particulate filter (DPF) 200 filters particulate matter (PM) contained in the exhaust gas discharged from the engine 2 by a filter. The particulate matter PM thus collected is periodically burned and then removed do. The exhaust gas having passed through the diesel particulate filter (DPF) 200 flows into the mixing pipe 300.
믹싱파이프(300)는 디젤여과필터(DPF)(200)와 선택적 촉매환원(SCR) 장치(400) 상호 간을 연통하는 구성요소이자 믹싱파이프(300)의 일측이 분사장치(310)와 연통되어 환원제가 내측으로 분사되는 곳으로, 일단부가 디젤여과필터(DPF)(200)의 타단부와 연통하고 타단부는 선택적 촉매환원(SCR) 장치(400)와 연통하는 파이프 형상의 부재이다.The mixing pipe 300 is a component communicating between the diesel filtration filter (DPF) 200 and the selective catalytic reduction (SCR) device 400, and one side of the mixing pipe 300 communicates with the injector 310 Shaped member that communicates with the other end of the diesel particulate filter (DPF) 200 and the other end communicates with the selective catalytic reduction (SCR)
이때, 분사되는 환원제는 디젤여과필터(DPF)(200)를 통과한 배기가스 중에 포함된 질소산화물과 화학반응을 일으켜 질소산화물을 환원시키는 것으로, 주로 요소(Urea) 또는 암모니아(NH3)가 사용될 수 있다.At this time, the injected reducing agent chemically reacts with the nitrogen oxide contained in the exhaust gas passing through the diesel particulate filter (DPF) 200 to reduce the nitrogen oxide, and mainly Urea or ammonia (NH 3 ) is used .
분사장치(310)의 제어하여 요소를 믹싱파이프(300) 내측으로 분사하는 경우, 분사된 요소는 암모니아와 물로 변환되고, 이러한 암모니아와 물은 상기 디젤여과필터(DPF)(200)를 통과한 배기가스와 믹싱파이프(300) 내에서 혼합된다.When the element is injected into the mixing pipe 300 under the control of the injection device 310, the injected element is converted into ammonia and water, and the ammonia and water are exhausted through the diesel particulate filter (DPF) Gas and the mixing pipe (300).
환원제와 배기가스의 균일한 혼합을 위해 믹싱파이프(300) 내에 와류발생 구조물(미도시)을 형성하고 분사장치(310)를 상기 와류발생 구조물 근처에 연결하여 환원제가 분사되도록 할 수 있다.A vortex generating structure (not shown) may be formed in the mixing pipe 300 for uniform mixing of the reducing agent and the exhaust gas, and the reducing agent may be injected by connecting the injecting device 310 to the vortex generating structure.
이렇게 믹싱파이프(300) 내에서 혼합된 환원제와 배기가스는 후술할 선택적 촉매환원(SCR) 장치(400) 내로 유입된다.The reducing agent and the exhaust gas mixed in the mixing pipe 300 are introduced into a selective catalytic reduction (SCR) apparatus 400 to be described later.
한편, 믹싱파이프(300)도 전술한 배기파이프(10)와 마찬가지로, 엔진 구동에 따른 진동을 보다 효과적으로 저감시키고, 열팽창에 따른 변형을 방지하기 위해 일측에 적어도 하나 이상의 플렉시블 조인트(11)에 의해 연결되는 연결부를 구비할 수 있다. 이러한 플렉시블 조인트(11)는 금속이나 내열성의 탄성체로 제작될 수 있다.Similarly to the exhaust pipe 10, the mixing pipe 300 is connected to at least one flexible joint 11 at one side thereof in order to more effectively reduce vibration due to engine driving and prevent deformation due to thermal expansion. As shown in Fig. Such a flexible joint 11 can be made of a metal or a heat-resistant elastic body.
선택적 촉매환원(SCR) 장치(400)는 상기 믹싱파이프(300) 내에서 배기가스와 혼합된 환원제가 상기 배기가스 중의 질소산화물(NOx)과 반응하여 질소(N2)와 물(H2O)로 변환되는 화학반응만을 선택적으로 활성화시켜 반응속도를 촉진하는 장치로, 상기 믹싱파이프(300)의 타단부와 연통되어 상기 카울프레임(100) 상단부에 장착되게 된다. 이러한 선택적 촉매환원(SCR) 장치(400)는 상기 디젤여과필터(DPF)(200)를 통해 HC, CO 및 입자상 물질(PM)이 저감된 배기가스 중에 포함된 질소산화물을 제거하기 위한 2차적인 저감장치에 해당한다.The selective catalytic reduction (SCR) device 400 reacts with the nitrogen oxides (NOx) in the exhaust gas to form nitrogen (N 2 ) and water (H 2 O) in the mixing pipe 300, The mixing pipe 300 is connected to the upper end of the cowl frame 100 by communicating with the other end of the mixing pipe 300. This selective catalytic reduction (SCR) device 400 is a secondary selective catalytic reduction (SCR) device 400 for removing nitrogen oxides contained in exhaust gas in which HC, CO, and particulate matter PM are reduced through the diesel particulate filter (DPF) It corresponds to abatement device.
이러한 선택적 촉매환원(SCR) 장치(400)는 디젤여과필터(DPF)(200)와 마찬가지로 엔진 출력 및 배기가스량에 따라 다양한 크기와 형상으로 제작될 수 있지만, 고온, 고압으로 유입되는 배기가스로 인한 충격을 효과적으로 완충시킬 수 있도록 원통형상으로 형성하되, 양단부는 서로 대향하는 반구형상으로 형성하는 것이 바람직하다. 즉 단면이 타원형태가 되도록 하는 것이다.As with the diesel particulate filter (DPF) 200, this selective catalytic reduction (SCR) device 400 can be manufactured in various sizes and shapes depending on the engine output and the amount of exhaust gas. However, It is preferable to form a cylindrical shape so as to effectively cushion the impact, and both ends are formed in a hemispherical shape facing each other. That is, the cross section is formed in an elliptical shape.
그리고 선택적 촉매환원(SCR) 장치(400)는 엔진(2)에 장착되는 것이 아니고, 엔진(2)과 인접하는 메인프레임(4) 일측에 장착되는 카울프레임(100) 상단부에 설치되므로, 엔진 구동에 따른 진동 및 작업 하중으로 인한 영향을 거의 받지 않게 된다. 따라서, 진동으로 인하여 선택적 촉매환원(SCR) 장치(400)의 용접부 또는 믹싱파이프(300)와의 연결부 등에 발생할 수 있는 크랙이나 파손과 같은 변형이 방지될 수 있다.Since the selective catalytic reduction (SCR) device 400 is installed not on the engine 2 but on the upper end of the cowl frame 100 mounted on one side of the main frame 4 adjacent to the engine 2, So that it is hardly affected by the vibration and the working load. Therefore, deformation such as cracks or breakage, which may occur in the welding portion of the selective catalytic reduction (SCR) device 400 or the connection portion with the mixing pipe 300 due to vibration, can be prevented.
이러한 선택적 촉매환원(SCR) 장치(400)는 디젤여과필터(DPF)(200)와 마찬가지로 고정부(500)를 통해 카울프레임(100) 상단부에 고정될 수 있다. 이때, 도 1에 도시된 것처럼, 디젤여과필터(DPF)(200)와 선택적 촉매환원(SCR) 장치(400)는 상기 카울프레임(100)의 길이방향(도 1의 상하방향)과 수평상태에서 서로 나란하게 병렬형태로 장착되도록 하여 카울프레임(100) 상단부의 공간을 효율적으로 활용할 수 있다. 이렇게 도 1에 도시된 선택적 촉매환원(SCR) 장치(400) 및 디젤여과필터(DPF)(200)의 배치는 수평면상에서 직각으로 회전된 배치로 변경할 수 있음은 물론이다.The selective catalytic reduction (SCR) unit 400 may be fixed to the upper end of the cowl frame 100 through the fixing unit 500, like the diesel particulate filter (DPF) 1, the diesel particulate filter (DPF) 200 and the selective catalytic reduction (SCR) apparatus 400 are disposed in a horizontal state with respect to the longitudinal direction of the cowl frame 100 So that the space at the upper end of the cowl frame 100 can be efficiently utilized. It should be understood that the arrangement of the selective catalytic reduction (SCR) device 400 and the diesel filtration filter (DPF) 200 shown in FIG. 1 may be changed to a rectangularly rotated arrangement on the horizontal plane.
한편, 선택적 촉매환원(SCR) 장치(400)와 카울프레임(100) 상단부는 고정부(500)에 의해 결합될 수 있다. 고정부(500)는 상기 선택적 촉매환원(SCR) 장치(400)의 하단부를 지지하고 상기 카울프레임(100) 상단부(구체적으로 고정브래킷(110) 상면)에 고정되는 탄성체인 받침부재(510)와, 상기 받침부재(510) 양단부에 구비되어 상기 선택적 촉매환원(SCR) 장치(400)의 외주면을 감싸 고정하는 체결밴드(520)로 이루어질 수 있다.Meanwhile, the selective catalytic reduction (SCR) unit 400 and the upper end of the cowl frame 100 may be coupled by the fixing unit 500. The fixing unit 500 includes a supporting member 510 that supports the lower end of the selective catalytic reduction (SCR) apparatus 400 and is an elastic body fixed to the upper end of the cowl frame 100 (specifically, the upper surface of the fixing bracket 110) And a fastening band 520 provided at both end portions of the support member 510 to surround and fix the outer circumferential surface of the selective catalytic reduction (SCR) device 400.
이때, 받침부재(510)는 지지되는 상기 선택적 촉매환원(SCR) 장치(400) 하단부의 외주면과 대응하는 형상으로 이루어져 밀착되며, 엔진 구동에 따른 진동을 저감할 수 있도록 탄성을 갖는 내열성 합성수지 등으로 형성될 수 있다. 이러한 받침부재(510)는 선택적 촉매환원(SCR) 장치(400)를 안정적으로 지지하기 위해 적어도 2개 이상이 구비되도록 한다.At this time, the support member 510 has a shape corresponding to the outer circumferential surface of the lower end of the selective catalytic reduction (SCR) device 400 supported by the support member 510 and is made of a heat resistant synthetic resin having elasticity so as to reduce vibration . At least two such support members 510 are provided to stably support the selective catalytic reduction (SCR) device 400.
그리고 체결밴드(520)는 상기 선택적 촉매환원(SCR) 장치(400)의 외주면을 감싸 고정할 수 있도록 한 쌍으로 이루어지되, 상기 받침부재(510) 양단부와 힌지결합을 통해 회동하도록 하며, 한 쌍의 체결밴드(520) 상호 간의 결합은 나사결합 등의 다양한 결합방식이 적용될 수 있다. 이러한 체결밴드(520)를 통해 선택적 촉매환원(SCR) 장치(400)는 받침부재(510) 상에 단단히 고정될 수 있다.The clamping bands 520 are paired so as to surround and fix the outer circumferential surface of the selective catalytic reduction (SCR) apparatus 400, and are configured to pivot through both ends of the supporting member 510 through hinge coupling, The fastening bands 520 may be coupled with each other by various coupling methods such as screw coupling. Through this fastening band 520, the selective catalytic reduction (SCR) device 400 can be securely fixed on the support member 510.
선택적 촉매환원(SCR) 장치(400) 내측에 구비되는 촉매는 제올라이트(Zeolite), 바나듐(Vanadium) 또는 이들을 소정비율로 포함하는 혼합물 등으로 이루어질 수 있으며, 이러한 촉매는 선택적 촉매환원(SCR) 장치(400) 내측면에 코팅처리됨으로써 배기가스 중 질소산화물의 환원반응을 촉진할 수 있다.The catalyst provided inside the selective catalytic reduction (SCR) unit 400 may be composed of zeolite, vanadium, or a mixture thereof in a predetermined ratio, and the catalyst may be a selective catalytic reduction (SCR) 400, the reduction reaction of nitrogen oxides in the exhaust gas can be promoted.
또한, 이러한 촉매는 디젤산화촉매(DOC)와 마찬가지로 배기가스의 흐름과 나란하게 형성된 다수의 관통홀이 형성된 벌집 형상의 다공성 부재(촉매담체)에 코팅되어 선택적 촉매환원(SCR) 장치(400) 내부에 구비되도록 함으로써, 배기가스와의 접촉면적을 크게 증대할 수 있다. 이로 인해, 촉매기능이 향상되어 배기가스 중 질소산화물의 환원반응은 광범위한 범위에서 일어나게 되고, 그 결과 배기가스 중 질소산화물은 보다 효과적으로 저감될 수 있다.Such a catalyst is coated on a honeycomb porous member (catalyst carrier) having a plurality of through holes formed in parallel with the flow of exhaust gas in the same manner as the diesel oxidation catalyst (DOC) The contact area with the exhaust gas can be greatly increased. As a result, the catalytic function is improved, so that the reduction reaction of nitrogen oxides in the exhaust gas takes place in a wide range, and as a result, the nitrogen oxides in the exhaust gas can be more effectively reduced.
그리고 선택적 촉매환원(SCR) 장치(400)는 이렇게 질소산화물이 저감된 배기가스를 배출파이프(410)를 통해 외부로 방출하게 된다. 이때, 배출파이프(410)는 상기 선택적 촉매환원(SCR) 장치(400)와 믹싱파이프(300)가 연결되는 측의 반대 측에 구비되도록 하는 것이 바람직하다.The selective catalytic reduction (SCR) unit 400 discharges the exhaust gas with reduced nitrogen oxide to the outside through the exhaust pipe 410. At this time, it is preferable that the discharge pipe 410 is provided on the side opposite to the side where the selective catalytic reduction (SCR) apparatus 400 and the mixing pipe 300 are connected.
이와 같이 선택적 촉매환원(SCR) 장치(400)는 상기 환원제를 매개로 한 배기가스 내 질소산화물(NOx)의 환원반응을 촉진하여 질소산화물과 같은 유해가스를 감소시키게 된다.Thus, the selective catalytic reduction (SCR) apparatus 400 promotes the reduction reaction of NOx in the exhaust gas via the reducing agent, thereby reducing harmful gas such as nitrogen oxides.
이상에서 살펴본 바와 같이, 본 발명에 따른 중장비용 배기가스 저감장치(1)는 일반적으로 사용되는 저감장치인 디젤여과필터(DPF)(200)에 선택적 촉매환원(SCR) 장치(400)를 더 구비하여 질소산화물(NOx)을 효과적으로 억제함으로써, 강화된 디젤 엔진 배기가스 규제요건을 충족시킴과 아울러 환경오염을 방지할 수 있게 된다.As described above, the heavy equipment exhaust gas reducing apparatus 1 according to the present invention further includes a selective catalytic reduction (SCR) apparatus 400 in the diesel particulate filter (DPF) 200, which is a generally used abatement apparatus Thereby effectively suppressing nitrogen oxides (NOx), thereby satisfying the regulated diesel engine exhaust gas regulatory requirements and preventing environmental pollution.
그리고 카울프레임(100) 상단부에 장착된 디젤여과필터(DPF)(200)와 선택적 촉매환원(SCR) 장치(400), 배기파이프(10)와 믹싱파이프(300) 일측에 각각 형성된 플렉시블 조인트(11) 및 탄성체로 이루어진 받침부재(510) 등의 구성요소를 유기적으로 결합함으로써, 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있게 된다. 이로 인해 저감장치(1)의 내구성은 대폭 증대될 수 있다.A diesel particulate filter (DPF) 200, a selective catalytic reduction (SCR) device 400 mounted on the upper end of the cowl frame 100, a flexible joint 11 formed on one side of the exhaust pipe 10 and the mixing pipe 300 And the support member 510 made of an elastic body are combined with each other, thereby minimizing the influence from vibration due to engine driving. As a result, the durability of the abatement apparatus 1 can be greatly increased.
그리고 디젤여과필터(DPF)(200)와 선택적 촉매환원(SCR) 장치(400)를 각각 양단부가 서로 대향하는 반구형상의 원통형으로 제작함으로써, 고온, 고압으로 유입되는 배기가스로 인한 충격을 효과적으로 완충시킬 수 있어 내구성의 증대를 도모할 수 있다.The diesel particulate filter (DPF) 200 and the selective catalytic reduction (SCR) device 400 are each formed into a hemispherical cylindrical shape with opposite ends facing each other, thereby effectively absorbing the impact due to the exhaust gas flowing at high temperature and high pressure So that the durability can be increased.
전술한 바와 같은 본 발명의 실시예에 따른 중장비용 배기가스 저감장치에 의하면, 디젤여과필터(DPF)에 선택적 촉매환원(SCR) 장치를 더 구비함으로써 강화된 디젤 엔진 배기가스 규제요건을 충족시키고, 디젤여과필터(DPF)와 선택적 촉매환원(SCR) 장치를 카울프레임 상에 장착하는 등의 다양한 방진 장치를 구비함으로써 엔진 구동에 따른 진동으로부터의 영향을 최소화할 수 있게 된다.According to the exhaust gas reducing apparatus for heavy equipment according to the embodiment of the present invention as described above, the diesel particulate filter (DPF) is further provided with a selective catalytic reduction (SCR) Various anti-vibration devices such as a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) device are mounted on the cowl frame, thereby minimizing the influence from vibration due to engine driving.

Claims (4)

  1. 중장비의 메인프레임에 장착되는 엔진과 일단부가 연결되는 배기파이프의 타단부에 구비되는 배기가스 저감장치에 있어서,
    상기 엔진과 인접하는 메인프레임 일측에 장착되어 상기 엔진의 진동에 따른 영향을 저감시키는 카울프레임;
    일단부가 상기 배기파이프의 타단부와 연통되어 상기 카울프레임 상단부에 장착되고, 디젤산화촉매(DOC)를 내측에 구비하며, 입자상 물질을 포집하는 디젤여과필터(DPF);
    일단부가 상기 디젤여과필터(DPF) 타단부와 연통되고, 일측이 환원제를 분사하는 분사장치와 연통되는 믹싱파이프; 및
    상기 믹싱파이프의 타단부와 연통되어 상기 카울프레임 상단부에 장착되고, 상기 분사된 환원제와 배기가스 내의 질소산화물(NOx) 간의 환원반응을 촉진하는 선택적 촉매환원(SCR) 장치를 포함하는 것을 특징으로 하는 중장비용 배기가스 저감장치.
    An exhaust gas abatement device provided at an engine mounted on a main frame of a heavy equipment and an exhaust pipe connected to one end of the exhaust pipe,
    A cowl frame mounted on one side of the main frame adjacent to the engine to reduce an influence of vibration of the engine;
    A diesel particulate filter (DPF), one end of which is connected to the other end of the exhaust pipe and is mounted on the upper end of the cowl frame and has a diesel oxidation catalyst (DOC) inside and collects particulate matter;
    A mixing pipe having one end communicating with the other end of the diesel particulate filter (DPF) and one end communicating with an injector injecting a reducing agent; And
    And a selective catalytic reduction (SCR) device connected to the other end of the mixing pipe and mounted on the upper end of the cowl frame for promoting a reduction reaction between nitrogen oxide (NOx) in the exhaust gas and the injected reducing agent Exhaust gas abatement equipment for heavy equipment.
  2. 제 1 항에 있어서,
    상기 디젤여과필터(DPF)와 상기 선택적 촉매환원(SCR) 장치는, 원통형으로 이루어지되 양단부는 서로 대향하는 반구형상으로 형성되며, 각각은 상기 카울프레임 상에서 서로 나란하게 장착되는 것을 특징으로 하는 중장비용 배기가스 저감장치.
    The method according to claim 1,
    Characterized in that the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) device are cylindrically shaped, the both ends of which are formed in a hemispherical shape facing each other, and each of them is mounted side by side on the cowl frame Exhaust gas reduction device.
  3. 제 2 항에 있어서,
    상기 배기파이프 및 상기 믹싱파이프 중 적어도 어느 한측에는 하나 이상의 플렉시블 조인트로 연결되는 연결부가 구비되는 것을 특징으로 하는 중장비용 배기가스 저감장치.
    3. The method of claim 2,
    Wherein at least one of the exhaust pipe and the mixing pipe is provided with a connection portion connected by at least one flexible joint.
  4. 제 3 항에 있어서,
    상기 카울프레임과 상기 디젤여과필터(DPF) 및 선택적 촉매환원(SCR) 장치와의 결합은,
    상기 디젤여과필터(DPF)와 상기 선택적 촉매환원(SCR) 장치의 하단부를 지지하고 상기 카울프레임 상단부에 고정되는 탄성체인 받침부재와, 상기 받침부재 양단부에 구비되어 상기 디젤여과필터(DPF)와 상기 선택적 촉매환원(SCR) 장치의 외주면을 감싸 고정하는 체결밴드를 포함하는 고정부를 통해 이루어지는 것을 특징으로 하는 중장비용 배기가스 저감장치.
    The method of claim 3,
    The combination of the cowl frame with the diesel filtration filter (DPF) and the selective catalytic reduction (SCR)
    A diesel particulate filter (DPF) and a diesel particulate filter (DPF) disposed at both ends of the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) And a fastening band that surrounds and fixes an outer circumferential surface of the selective catalytic reduction (SCR) device.
KR1020147018497A 2012-01-06 2012-01-06 Exhaust gas reduction device for heavy equipment KR20140116083A (en)

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